Ward, M., & Toy, J. D. (1827). Remarks, propositions and calculations, relative to a rail-road and locomotive engines to be used upon the same, from Baltimore to the Ohio River. Baltimore:: Printed by John D. Toy, corner of St. Paul and Market Streets..

Ward, Minus., and John D. Toy. Remarks, Propositions and Calculations, Relative to a Rail-road and Locomotive Engines to Be Used Upon the Same, From Baltimore to the Ohio River. Baltimore:: Printed by John D. Toy, corner of St. Paul and Market Streets., 1827.

Ward, Minus., and John D. Toy. Remarks, Propositions and Calculations, Relative to a Rail-road and Locomotive Engines to Be Used Upon the Same, From Baltimore to the Ohio River. Baltimore:: Printed by John D. Toy, corner of St. Paul and Market Streets., 1827.